This is a tracker for ray of hope that shows up on raid frames.
The blue bar indicates the health that the ray of hope target will go to after the ray ends, based on the current damage and healing in the ray. If the bar turns red, it means that the ray of hope will currently kill the target. The bar extending to the right of the raid frame indicates that the ray of hope will overheal the target.
In order to make the results accurate change the group scale until the green bar is as wide as your raid frames.
You can modify the custom options for each component of the group to change the x and y offset of the display.
You can enable a timer tracker bar to show you the remaining time on the ray, if you uncheck load never in the green bar in the group.